Install psalm as dev, sync scripts updates

vendor/felixfbecker/language-server-protocol/src/Hover.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+/**
+ * The result of a hover request.
+ */
+class Hover
+{
+    /**
+     * The hover's content
+     *
+     * @var string|MarkedString|string[]|MarkedString[]|MarkupContent
+     */
+    public $contents;
+
+    /**
+     * An optional range
+     *
+     * @var Range|null
+     */
+    public $range;
+
+    /**
+     * @param string|MarkedString|string[]|MarkedString[]|MarkupContent $contents The hover's content
+     * @param Range $range An optional range
+     */
+    public function __construct($contents = null, $range = null)
+    {
+        /** @psalm-suppress PossiblyNullPropertyAssignmentValue */
+        $this->contents = $contents;
+        $this->range = $range;
+    }
+}